There is no such provision in the tax law. Strictly speaking, there is no time limit. However, the tax bureau has its own checkout and cancellation procedures. If you receive the ticket for a long time, his account will always be open. It's like a knot (needs to be paid upwards), so it usually stipulates how long it must be used up, and any unused tickets must be discarded and new tickets issued. The time varies from place to place, here it is two months, but as long as the ticket is issued by the system, it will definitely be valid.